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/**
* \file test_thread_messages
* \author Tadeas Vintrlik <xvint04@stud.fit.vutbr.cz>
* \brief libnetconf2 tests - thread-safety for receiving messages
*
* Copyright 2021 Deutsche Telekom AG.
* Copyright 2021 CESNET, z.s.p.o.
*
* This source code is licensed under BSD 3-Clause License (the "License").
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://opensource.org/licenses/BSD-3-Clause
*/
#define _GNU_SOURCE
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <libyang/libyang.h>
#include "ln2_test.h"
/* sec */
#define CLIENT_SSH_AUTH_TIMEOUT 10
#define nc_assert(cond) if (!(cond)) { fprintf(stderr, "assert failed (%s:%d)\n", __FILE__, __LINE__); exit(1); }
#if _POSIX_BARRIERS >= 200112L
pthread_barrier_t barrier;
pthread_barrier_t barrier_msg;
#endif
typedef struct arg {
int in;
int out;
struct ly_ctx *ctx;
} arg_t;
struct nc_server_reply *
rpc_clb(struct lyd_node *rpc, struct nc_session *session)
{
struct lyd_node *e;
(void)session;
if (!strcmp(LYD_NAME(rpc), "get") || !strcmp(LYD_NAME(rpc), "delete-config")) {
return nc_server_reply_ok();
} else if (!strcmp(LYD_NAME(rpc), "commit")) {
e = nc_err(LYD_CTX(rpc), NC_ERR_RES_DENIED, NC_ERR_TYPE_APP);
nc_err_set_path(e, "/module-a:top/name");
return nc_server_reply_err(e);
} else {
nc_assert(0);
}
}
static void *
server_thread(void *arg)
{
struct nc_session *sess;
struct nc_server_notif *notif;
struct lyd_node *ntf;
struct ly_in *in;
struct nc_pollsession *ps;
arg_t args = *(arg_t *)arg;
char *eventtime;
struct timespec ts;
const char *data;
int poll;
nc_assert(!nc_server_init());
nc_assert(nc_accept_inout(args.in, args.out, "test", args.ctx, &sess) == NC_MSG_HELLO);
nc_session_inc_notif_status(sess);
data =
"<n1 xmlns=\"n1\">\n"
" <first>Test</first>\n"
"</n1>\n";
nc_assert(ly_in_new_memory(data, &in) == LY_SUCCESS);
nc_assert(lyd_parse_op(args.ctx, NULL, in, LYD_XML, LYD_TYPE_NOTIF_YANG, &ntf, NULL) == LY_SUCCESS);
ly_in_free(in, 0);
nc_assert(clock_gettime(CLOCK_REALTIME, &ts) != -1);
nc_assert(ly_time_ts2str(&ts, &eventtime) == LY_SUCCESS);
notif = nc_server_notif_new(ntf, eventtime, NC_PARAMTYPE_FREE);
ps = nc_ps_new();
nc_assert(ps);
nc_ps_add_session(ps, sess);
/* get for ietf-yang-library data; delete-config in test */
poll = nc_ps_poll(ps, 1000, &sess);
nc_assert(poll == NC_PSPOLL_RPC);
poll = nc_ps_poll(ps, 1000, &sess);
nc_assert(poll == NC_PSPOLL_RPC);
nc_server_notif_send(sess, notif, 1000);
/* commit in test */
poll = nc_ps_poll(ps, 1000, &sess);
nc_assert(poll == (NC_PSPOLL_RPC | NC_PSPOLL_REPLY_ERROR));
nc_ps_clear(ps, 1, NULL);
nc_ps_free(ps);
/* waiting for end of test */
pthread_barrier_wait(&barrier);
nc_server_notif_free(notif);
return arg;
}
static void *
notif_thread(void *arg)
{
struct nc_session *sess = (struct nc_session *)arg;
struct lyd_node *envp;
struct lyd_node *op;
NC_MSG_TYPE msgtype;
/* sync threads for receiving message to increase chance of datarace */
pthread_barrier_wait(&barrier_msg);
do {
msgtype = nc_recv_notif(sess, 1000, &envp, &op);
} while (msgtype == NC_MSG_REPLY);
nc_assert(msgtype == NC_MSG_NOTIF);
lyd_free_tree(envp);
lyd_free_tree(op);
return arg;
}
int
main(void)
{
int pipes[4];
struct nc_session *sess;
struct lyd_node *op, *envp;
struct ly_ctx *server_ctx, *client_ctx;
struct nc_rpc *rpc;
uint64_t msgid;
NC_MSG_TYPE msgtype;
const char *features[] = {"startup", "candidate", NULL};
arg_t thread_arg;
pthread_t t[2];
char *str;
pthread_barrier_init(&barrier, NULL, 2);
pthread_barrier_init(&barrier_msg, NULL, 2);
/* create a two pipes */
nc_assert(pipe(pipes) != -1);
nc_assert(pipe(pipes + 2) != -1);
thread_arg.in = pipes[0];
thread_arg.out = pipes[3];
/* create both contexts */
nc_assert(ly_ctx_new(TESTS_DIR "/data/modules", 0, &server_ctx) == LY_SUCCESS);
nc_assert(ly_ctx_load_module(server_ctx, "ietf-netconf", NULL, features));
nc_assert(ly_ctx_load_module(server_ctx, "notif1", NULL, NULL));
nc_assert(ly_ctx_load_module(server_ctx, "module-a", NULL, NULL));
thread_arg.ctx = server_ctx;
nc_set_global_rpc_clb(rpc_clb);
nc_assert(ly_ctx_new(TESTS_DIR "/data/modules", 0, &client_ctx) == LY_SUCCESS);
nc_assert(ly_ctx_load_module(client_ctx, "ietf-netconf", NULL, features));
nc_assert(ly_ctx_load_module(client_ctx, "notif1", NULL, NULL));
nc_assert(ly_ctx_load_module(client_ctx, "module-a", NULL, NULL));
/* start server thread */
pthread_create(&t[0], NULL, server_thread, &thread_arg);
nc_client_init();
/* listen for notifications */
sess = nc_connect_inout(pipes[2], pipes[1], client_ctx);
nc_assert(sess);
pthread_create(&t[1], NULL, notif_thread, sess);
/* send delete-config rpc */
rpc = nc_rpc_delete(NC_DATASTORE_STARTUP, NULL, NC_PARAMTYPE_CONST);
nc_assert(nc_send_rpc(sess, rpc, 1000, &msgid) == NC_MSG_RPC);
/* sync threads for receiving message to increase chance of datarace */
pthread_barrier_wait(&barrier_msg);
do {
msgtype = nc_recv_reply(sess, rpc, msgid, 1000, &envp, &op);
} while (msgtype == NC_MSG_NOTIF);
nc_assert(msgtype == NC_MSG_REPLY);
nc_rpc_free(rpc);
lyd_free_tree(envp);
/* send commit rpc */
rpc = nc_rpc_commit(0, 0, NULL, NULL, NC_PARAMTYPE_CONST);
nc_assert(nc_send_rpc(sess, rpc, 1000, &msgid) == NC_MSG_RPC);
do {
msgtype = nc_recv_reply(sess, rpc, msgid, 1000, &envp, &op);
} while (msgtype == NC_MSG_NOTIF);
nc_assert(msgtype == NC_MSG_REPLY);
nc_rpc_free(rpc);
lyd_print_mem(&str, envp, LYD_XML, LYD_PRINT_SHRINK);
nc_assert(!strcmp(str,
"<rpc-reply xmlns=\"urn:ietf:params:xml:ns:netconf:base:1.0\" message-id=\"3\"><rpc-error>"
"<error-type>application</error-type>"
"<error-tag>resource-denied</error-tag>"
"<error-severity>error</error-severity>"
"<error-path xmlns:a=\"urn:jmu:params:xml:ns:yang:module-a\">/a:top/a:name</error-path>"
"<error-message xml:lang=\"en\">Request could not be completed because of insufficient resources.</error-message>"
"</rpc-error></rpc-reply>"));
free(str);
lyd_free_tree(envp);
/* waiting of end of test */
pthread_barrier_wait(&barrier);
pthread_join(t[0], NULL);
pthread_join(t[1], NULL);
/* cleanup */
nc_session_free(sess, NULL);
ly_ctx_destroy(server_ctx);
ly_ctx_destroy(client_ctx);
for (uint8_t i = 0; i < 4; i++) {
close(pipes[i]);
}
return 0;
}
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